It happened about 2 p.m. on Wednesday at East 167 Street and Gerard Avenue.
An employee was in the process of unloading cash from his truck when the robber came up to him and pushed him. The man then grabbed a bag containing $200,000 and ran off.
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The NYPD released a video of the suspect. He is approximately 5'8" and approximately 160 pounds. He was wearing a navy blue hoodie, gray sweatpants, and a black mask.
Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS. Police say all calls are strictly confidential.